You could remove the DNS block and only block it from loading from 3rd party sites using the built-in Firefox support or a suitable WebExtension (and also block

You could remove the DNS block and only block it from loading from 3rd party sites using the built-in Firefox support or a suitable WebExtension (and also block it in non-browser apps if desired by setting up a MITM proxy with a certificate only trusted by the browser and user agent filtering).